MetaConversation A B Start A-Requested A SendMessage StartCPForm Nothing Done A SendMessage TextMessageForm Bye B-Requested B SendMessage StartCPForm Nothing Done B SendMessage TextMessageForm Bye B-Accepted B SendMessage TextMessageForm OK Done B SendMessage TextMessageForm Refuse B-Requested B SendMessage StartCPForm Nothing A-Accepted A SendMessage TextMessageForm OK Done A SendMessage TextMessageForm Refuse A-Requested A SendMessage StartCPForm Nothing Policy A A-Role B B-Role Start ChildReturn ChildReturn Policy A A-Role B B-Role Start ChildReturn ChildReturn Done